package com.spring.component.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author liushihua
 * @since 2018年03月15日
 */
@Component
public class SpringContextUtil implements ApplicationContextAware {
  private static ApplicationContext applicationContext;

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    if (this.applicationContext == null) {
      this.applicationContext = applicationContext;
    }
  }

  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  public static Object getBean(String name) {
    return applicationContext.getBean(name);
  }

  public static <T> T getBean(Class<T> clazz) {
    return applicationContext.getBean(clazz);
  }

  public static Object getBean(String name, Class requiredType) {
    return applicationContext.getBean(name, requiredType);
  }

  public static boolean containsBean(String name) {
    return applicationContext.containsBean(name);
  }

  public static boolean isSingleton(String name) {
    return applicationContext.isSingleton(name);
  }

  public static Class getType(String name) {
    return applicationContext.getType(name);
  }

  public static String[] getAliases(String name) {
    return applicationContext.getAliases(name);
  }
}
